Method of making connecting-rods.



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METHOD OF MAKING CONNECTING RODS.

APPLICATION FILED APR.24. ms 9 9 Patented Mar. 21,1916.

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METHOD OF MAKING CONNECTING RODS.

, APPLICATION FILED APR.24, I915. wwm.

Patented Mar. 1916.

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' HEBRON ZB/LAYMAN, OF NEW YORK, N. Y., ASSIGNOR TO THE LAYMAN PRESSEDROD CO., INCL, OF NEW YORK, N. Y. A CORPORATION OF NEW YORK.

METHOD OF MAKING CONNECTING-RODS.

Specification of Letters Yatent.

Patented Mar. 2i, iaie.

Application filed April 24, 1915. Serial No. 23,729.

To all whom it may concern Be it known that I, HEBRON B. LAYMAN,

a citizen of the United States, and residing at New York, in the countyof New York and State of New York, have invented certain new and usefulImprovements in the Method of Making connectin'grftods, of which thefollowing is a specification, such as will enable those skilled in theart to tion engines where'great strength in proportion to the weight ofmetal employed is re-.

quired, but my improved connecting rod is not limited to such use butmaybe'employed wherever connecting rods are required; and my inventionrelates more particularly to connecting rods made-of, or

from, sheet metal, particularly steel, and the invention consists in themethod hereinafter described of stamping or forming a connecting rodfrom a blank or blanks of sheet metal, said rod being divided centrallyand longitudinally intov two separate similar parts conibined'to form acomplete and oper- V ative whole of the desired form and dimensions, andin the method of finishing said rod as herein described.

The invention is fully disclosed in the following specification, ofwhich the accompanying drawingsform a part, in which I have shown thesuccessive steps of the'process employed by me for forming a connectingrod according tomy invention, and in which the separate parts aredesignated by suitable reference characters in each of the views, and inwhich l Figure 1 is a view of a blank from which one-half of my improvedconnecting rod is formed; Fig. 2 an edge view showing the.

first step of my improved process;'Fig. 2" is a section through thesmall end of the rod half shown in Fig. 2; Fig. 3 a view similar to Fig.2 showing the third step in the, process; .Fig. 4 an outside view of thehalf of a rod shown in Fig. 3 and indicating the fourth step in theprocess; Fig. 5 an outside view of the half of a rod shown in Fig. 4 andshowing the fifth step in the process Fig. 5 a cross section on the line5-5 of Fig. 5; Fig. 6a sectional viewon the line 66 of Fig.5 andshowingthe sixth step in the process; Fig. 7 a view similar to Fig. 6 butshowing both halves of the rod con-- nected and showing also the seventhstep in the. process; Fig. 8 a side view of the'rod shown in Fig. 7 andshowing the eighth step in the process; and, Fig. 8 shows a detailedconstruction of the smaller end and itis more particularly referred tohereafter; Fig. 9 a view similar to Fig. 8 and showing the ninth step inthe process.

For the purpose of. this description the end of the connecting rod whichis connected with the crank shaft of the engine will be called thelargerend, while the end that is connected with the piston will be called thesmaller end- In the practice oftmy invention, I stamp froma'suitablesheet of metal, preferably steel, the blank shown at a in Fig.1, said blank being provided with a smaller end a to the smaller. end,and two of said blanks are employed. The next step in the process,

consists in forming on one side of the smaller end aboss a and on thelarger end a correspondi'ngbut larger boss a, the edges of which arecrimped or-folded inwardly slightly as indicated-at at. These two stepsof the process, namely, the cutting of the 5" blank a and the formationof the bosses g and a may be performed at'a single contin nousoperation, or at 'two separate operations in a suitable die or press. Insome instances, the depth of the bosses a and a is so'great a's tonecessitate redrawing. In some instances where the bosses are very deepI pierce a. hole a in the blank at a point to correspond with. thebottom of the boss tobe drawn as shown in Fig. 2 and this verymaterially reduces the tendency to stretch the metal in drawing thebosses. In Fig. 2 I show the small end of the blank of Fig. 2 but havingthe hole just referred to The third step of the process is shown in Fig.3 and consists in forming a channel in one side of the shank portion aand a cor responding rib bon the other side At this time a set screwboss 6 Fig. .4, is also formed in the smaller end of the blank and anda, and this step, if desired, may be cess to the bottom of the hole inthe boss avhe'n the piston is assembled upon the rod.

In the above described operation the radial side ribs Z1 in the largerend are also formed.

The above step'of the process, as will be I simply consists in forming aflange c which, as shown, extends entirely around the half' The separatesteps of the process shown in-Figs. l and ,5 may, if desired, becombined and performechin one of the rod in Fig. o.

single operation.

The step of the process shown in Fig. 6

consists, simply in piercing or cutting out or cutting off the bottomsof the bosses a" combined with the fourth step of the process shown orindicated in Fig. l, and which is also a trimming operation.

, The next step of the process is shown in Fig. 7 and consists inassembling the two halves of the rod upon the sleeve bearings I] and (Zand .the set screw bushing (Z then fitting in the flange bushings (Zshown in the larger end of the rod in Figs. 7 and 8. At this time thehalves of the rod are spot welded together, or riveted as shown at (l inFig,

8, or brazed or otherwise secured together. In some instances thefriction of the rodhalves upon the bushings (Z and (Z is alonesufficient to retain the halves in place.

B 'azing together the elements of the rod lends a value that is notobtainable througo riveting or spot welding alone, for the spelter,besides thoroughly uniting the ele ments, serves to fill the niches andunevennesses which occur informing the several pieces.

In Fig. 8 the rod is shown fitted with washers (Z at the cap end of thebolt bosses and washers (Z at the-rcd end of the bolt bosses. In theformer case the washers are,

fiat to allow the nut to turn, whereas in the latter case' the washersare bent, upwartb on one side to prevent the bolt from turning. All ofthese washers have extending edges which are bent around the flange 0 soas to retain them in place and prevent-the spreading of the rod-halvesat this point. i i I have previously pointed out that I prefer to brazethe rods and this bra ing occurs after the rods are put in the conditionshown in Fig. 8.

Sometimes after brazing it is necessary to straighten the rods tocorrect any warpage that may occur through the heat of brazing. Afterbrazing the rods are generally nickelplated; then occur the machiningoperations when such are necessitated. In some cases the bushings in thelarger and smaller ends are reamed and the set screw bushing d isdrilled and tapped for the set screw as shown in Fig. 8*. Also in somecases it-is desirable to ream the bolt bosses in the larger end of therod.

Generally, the last operation in forming the rod is the sawingthe largerend thereof transversely to form \the cap portion 6 as shown in Fig. 9.In this figure the cap is shown cut from the red but assembled to therod with shims and bolts a in the conventional manner.

It should be clearly understood that I am not liurited to thearrangement of bushings \shown; for example, I might eliminate Where Iusethe term piercing in rela tion to the trimming off or cutting out ofthe bottoms of t e bosses a and a I mean to signify only hat the bottomsof these bosses are cut out, I do not bind myself to any specific meansfor, or manner of, trimming these bosses, or the bottoms thereof. WhileI have referred in this specification to sawing the larger end of therod transversely to form a cap it will be understood that this sawing ordividing of the larger end to form a cap is not necessary at all times,and especially when the smaller class ofrods are being made which arefrequently formed Withoutcaps, and tliat instead of forn'iing one rod ata time, as herein shown and described, I may ,form two rods with thelarger ends at the c'dnter and then saw said larger ends t 'ansver'selyto separate the rods and then form-or provide thejcap for each rod whendesired.

By means of my invention a connecting rod may be made ofsteel blanks atmuch less expense than has heretoforebeen possible, and a rod so madewill possess greater strength than any rod of the same dimensions andweight made by any other process. I

IVhile I have shown and described the preferred steps of my improvedprocess for making connecting rods and the order of said steps, myinvention is not limited to this exact order, and changes therein andmodifications thereof may be made within the scope of the appendedclaims, without 1. The-process herein described of form inga connectingrod from sheet metal and consisting of two separate longltudmal partsformed from separate similar. blanks, v

which consists in stamping out the blanks of the-desired form andinvolving acentral shank portion andsmaller and larger end portionsforming piston and crank pin bosses on said end portions, forming boltbosses in the larger end portion, piercing,

said piston pin and crank pin bosses, con: nectingthe separate arts ofthe rod, and sawing the larger en portion transversely.

2. The process herein described of forming a connecting rod from sheetmetal and consisting of two separate longitudinal parts formed fromseparate similar blanks, which consists in stampingout the blanks of the:1

desired form andinvolvinga central shank portion and smaller and largerend portions forming piston andpcra'nk pin bosses 'on said end portions,forming bolt bosses in the larger endportion, piercing said piston pinand crank 'pin bosses, connecting the separate parts of the rod, brazingthe complete rod thus formed, and. sawing the larger end portiontransversely.

3. The process herein described of forming aconnecting rod from sheetmetal and consisting of two similar parts formed from similar blankswhich consists in stamping out the blanks ofthe desired form andjin--volving the central shank portions and smaller and larger end portions,forming piston pm and crank pin bosses on said ends, ribbing the shankportion andforming bolt bosses inthe larger end portion, piercing I thesaid piston pin and crank pin bosses,

connecting the separate parts of the rod, and

sawing the larger end portion transversely.

4. The process herein described of forming a connecting rod from sheetmetal and consisting of two similar blanks, which consists in stampingout the blanks of the desired form and involving a central'shankportionand smaller and larger end portions, forming piston pin and crank pinbosses on said end-.portions, ribbingthe shank portion and forming boltbosses in the larger end portion,. flanging the side edges of the blank.and p'iercing the said piston pin and crank pin bosses, connecting theseparate parts ofthe rod and sawing the,

larger endportion transversely.-

5. The process herein described of forming a connecting rod fromsheetmetaland sists in stamping "out the blanks of the-de- "siredtorm andinvolving a central'shank consisting of two similar blanks, which con'ver'sely.-;- 8. The process herein described-of .for'ming a'connectingrod from sheet metal and consisting of two similar blanks, which"consists in stamping out the blanks of'the desired formand involving acentral shank portion and smallerand'larger end portions, formin pistonpin and crank pin bosses on said en portions, ribbing the shank portionand forming bolt bosses in both end portions, .piercing the said pistonpin and crank pin bosses, connectingthe separate parts of the rodand-sawing the larger end portion transverselyn 1 1 7. The-processherein: described of forming, a connecting rodfrom sheet metal andconsisting of two similar blanks, which consists in stamping outthe-blanks of the desired form and involvin a central shankportionyandsmaller an larger end portions forming piston pin and crankpin bosses on said end portions, piercing. said bossesandribbing theshank portion, forming bolt 'bosses"in the larger-end portion,'and'saW1ngtl1e larger end portion transc'onsistingof twosimilar blanks,which consists in stamping out the blanks of the desirednform' andinvolving a central shank portion and smaller .'and larger end por--tions, forming piston pin and crank pin bosses on said endv-portions,ribbing the shank portion and forming bolt bosses in the larger'endportion, flanging the side 7 edgesof theblank and piercing the saidpiston pin and-crank pin bosses, connecting the separate parts of therod, brazingfsaid rod, and sawing the larger end portion transversely; i

9,.The process herein described of forming a connecting rod from sheetmetal and consisting of two similar blanks, which conportion and formingbolt bosses in the larger end portion, piercing the said piston p n andcrank p1n bosses, connecting the separate parts of the rod, brazing saidrod,

securing sleeve bearings in said bosses, and

sawing the larger end portion transversely.

10. The process herein described of forma connecting-rod from twosubstantially sists in stamping out the blanks of the desimilar sheetmetal parts, which consists in 4 suitably fashioning the parts andproviding the ends with integral perforated bosses, connecting the twoparts, and separating the two parts transversely of the axis of one ofthe bosses to form a cap.

11. The process herein described of form ing a connecting rod fromtwosubstantially similar sheetmetal parts, which consists in fashioningthe parts to the desired form and involving a central shank portion andsmaller and larger end port1ons,-form1ng integral perforated bosses insaid end portions, connecting the two parts of the rod,

and separating the larger end portions trans- 15' versely of the axis ofthe boss, to form a cap. In testimony that I claim the foregoing as myinvention I have signed my 'name in presence. of the subscribingWitnesses this 23rd day of April 1915.

' HEBRON B LAYMAN. WVitnessesr- I i 'C. MULREANY,

H. E. THOMPSON.

